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Preparation method for realizing micro-encapsulation of core material by acoustic surface wave atomizer

A surface acoustic wave and microencapsulation technology, which is applied in the field of preparation in the field of microencapsulation technology, can solve the problems of complex manufacturing process, expensive equipment, low production efficiency of microcapsules, etc., and achieves the effect of improving efficiency and speed.

Inactive Publication Date: 2011-05-04
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although these methods can produce microcapsules with a particle size of about 50 μm, the production efficiency of microcapsules is low because the microcapsule emulsion particles are produced one by one, and the manufacturing process of this method is complicated and the equipment is expensive.

Method used

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  • Preparation method for realizing micro-encapsulation of core material by acoustic surface wave atomizer
  • Preparation method for realizing micro-encapsulation of core material by acoustic surface wave atomizer
  • Preparation method for realizing micro-encapsulation of core material by acoustic surface wave atomizer

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Embodiment 1

[0019] The preparation process of the specific embodiment is as follows:

[0020] Step 1, configure the core material emulsion and coagulant:

[0021] Configuration of sesame oil emulsion: First, configure 100ml of sodium alginate aqueous solution with a mass fraction of 3%, then configure 100ml of a mixed aqueous solution with a mass fraction of 0.2% monoglyceride and a mass fraction of 0.4% Tween-80, and then mix 100ml of Sodium alginate aqueous solution, 100ml mixed emulsifier solution and 100ml water were poured into a beaker and mixed and stirred. After stirring evenly, put it in a constant temperature water bath at 50℃~60℃. Finally, under constant stirring of the mixed solution, slowly add 20ml of sesame oil core material. After the jet is added, continue to stir until uniform, stop stirring, and the resulting mixed solution is the sesame oil emulsion;

[0022] Configuration of coagulant: calcium chloride aqueous solution with a mass fraction of 2%;

[0023] Step 2, by...

Embodiment 2

[0027] The preparation process is as follows:

[0028] Step 1, configure the core material emulsion and coagulant:

[0029] Configuration of sea buckthorn oil emulsion: first take 100ml of sea buckthorn oil, add 0.2 mg of vitamin E (VE) to sea buckthorn oil, stir well, then add 2.4 g of emulsifier S-170 and stir well to obtain sea buckthorn oil emulsion ;

[0030] Configuration of coagulant: first dissolve 5mg of gum arabic into a viscous solution with 100ml of water, then add 2.4mg of emulsifier S1570, 1mg of citric acid monoglyceride and 1mg of malt lake essence to the viscous solution, and stir until uniform , the condensate is obtained;

[0031] Step 2, by the formula D = 0.34 8 πγ ρ f 2 3 Obtain the resonant frequency of the SAW atomizer, where γ represents the surface tension of the...

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Abstract

The invention relates to a preparation method for realizing the micro-encapsulation of a core material by using a sound surface wave (SWA) atomizer in the technical field of micro-encapsulation. The preparation method comprises the following steps: obtaining a resonant frequency of the sound surface wave atomizer through a formula D=0.34*(8pi*gamma / (rho*f<2>))<1 / 3>; placing a core material emulsion on the sound surface wave device, staring a pump, charging hot water from a hot water inlet and discharging the hot water from a hot water outlet, starting the sound surface wave atomizer to work, producing atomized particles of the core material emulsion, and moving the particles in an internal tube toward the direction where the pump is positioned; and introducing the atomized particles of the core material emulsion into a flocculant, reacting, and completing the micro-encapsulation process. The method uses the surface wave atomizer to atomize the core material emulsion, and forms a great number of core material emulsion particles once. The method can also obtain microcapsules with various particle sizes by changing the resonant frequency of the SAW atomizer. The minimal particle size of the microcapsules produced by the method reaches 50 mu m; and the method greatly improves the producing speed of the core material emulsion particles and the producing efficiency of the microcapsules.

Description

technical field [0001] The invention relates to a preparation method in the technical field of microencapsulation, in particular to a preparation method for realizing core material microencapsulation by using a surface acoustic wave atomizer. Background technique [0002] Since the 1950s, people began to pay attention to the realization of microcapsule preparation technology. People first used the orifice method to prepare microcapsules. However, the microcapsules prepared by this method are relatively large, generally above 500 μm. In recent years, with the rapid development of microencapsulation technology, the application fields are also expanding. This places higher and higher requirements on the quality of microcapsules, especially in order to achieve a smaller appearance size of the microcapsules. Zhao Bin et al. published the article "Study on the Stability of Phospholipid Microencapsulated Emulsion" in "Chinese Journal of Cereals and Oils", Vol. 23, No. 6, Nov. 20...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/04B01J19/10
Inventor 李以贵张冠高阳孙健陈少军
Owner SHANGHAI JIAOTONG UNIV
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